(I had a bad cold, I was very uncomfortable, and I slept on my desk for two hours this morning······ Today's closure, thank you for your support, if you have any comments, please leave a message, or join the readership, see the announcement for the group number. Because of the cold these days, if there are any problems, please be considerate'~~~~)

"Fu Zhi, how is this knife?"

"Even if you can't blow your hair and cut your hair, you can still sharpen iron like clay, but it's a good knife. Is this sword for reward, Your Majesty? ”

"Hahahaha, if you can get such an evaluation, the ordnance supervisor will not be busy in vain. It's not the turn of the knife to be rewarded, it's a long knife made by the Armorylord using a new method, and I plan to use it to equip my army. Fu Zhi can see how this knife differs from the knives used in the army? ”

Li Yu picked up the knife and walked twenty or thirty paces away—this was his cautiousness—and swung it lightly. In the end, it was next to the Taiye Pool, with sufficient resources, Li Yu motioned to the palace people to bring up a piece of log, Li Yu saw the position, went down with a knife, and said:

"This knife is not only sharp, but also durable. Equipped with this kind of knife, the officers and men of our army will inevitably be strengthened. I don't know what this knife is called."

Due to the problem of forging technology, it is common for soldiers to roll the blade of their weapons on the battlefield, and Li Yu said this is an affirmation of this knife.

Li Yu couldn't help but be proud when he heard this, and was about to speak, when he suddenly heard a loud rumbling sound from the north. Li Chanted:

"This sword, Wang Pi named it Yongzhen Knife-Fu Zhi, do you know what kind of sound this is?"

Li Yu said:

"Mo is not thunder? The minister came from Fengxiang, and there was no thunder all the way, but he always heard thunder in the past two days when he arrived in Chang'an. It is said that His Majesty is benevolent, and even in winter, the heavens also send thunder to His Majesty. ”

This is naturally nonsense, winter thunder and earthquakes, summer rain and snow, are all abnormal phenomena, how can it be said to be a good omen. Li Yu smiled:

"Do you believe that?"

That being said, Li Yu is still very useful. The ministers all felt that the emperor was now more and more fond of listening to good words, although he would not be too angry when he heard bad words.

Seeing that Li Yu couldn't guess, Li recited:

"Fu Zhi, I'll take you to see something tomorrow."

Li Yu returned to Beijing this time for the purpose of reporting on his work. Originally, it has become a common practice not to report on the work of the court, but who is Li Yu? Li Yu knew that going to Beijing to report on his work was just a formality, but in today's approaching collapse of etiquette, this form is also very important. In this way, Li Yu was telling the same Jiedu envoys as him that the army had now been reorganized and the generals were regrouped into the country's system. In the past year, the merits of the border generals have not been higher than Li Yu's, and under Li Yu's leadership, the Jiedu envoys from all over the northwest have come to Chang'an like a dream to report on their work in the DPRK -- this situation seems to have not been seen for a long time.

However, to see the baby, naturally you can't bring all the knots with you, Li Yu only brought Li Yu and Hao Jue. Early the next morning, the emperor's car drove out of the Daming Palace, and as soon as he left the Xuanwu Gate, Li Yu and Hao Yu had been waiting here for a long time. The emperor ordered the two to follow the car and walk to the depths of Longshou Plain.

The snow field is vast, and people who have been tired for a year are in the cat winter. Not too many people pay attention to this car, maybe it is a big family to take a look in the Zhuangzi, A few old men basking in the sun saw it from afar.

A large courtyard appeared on the horizon, and the convoy, which had been unattended all the way, was finally checked, and after three inspections, the convoy arrived in front of the courtyard. On the tower, a soldier shouted:

"Ordnance Prison Ground, forbidden to enter, who is ahead? Stop driving! ”

An officer rode out of the queue and put a waist card into a bamboo basket hanging from the watchtower, and after the officer guarding the gate checked it, he ordered the suspension bridge to be pulled up and a group of people waited to come in. Li Yu and Hao Yu glanced at each other, and they both felt that there must be something unusual about this place being so heavily guarded. After coming in, Yi Shen, the secretary of the Ministry of War, Zhang Yang, the secretary of the Ministry of Industry, and Wang Pi, the young superintendent of the military department, have been standing by the door for a long time. Also standing on the side was Li Yuan. Li Yu waved his hand, signaling that he didn't need to be formal, and got out of the car with the help of the prince.

Wang Pi said:

"Your Majesty, everything is ready."

Li Chanted:

"Let's get started! Let the two generals evaluate the results of your ordnance superintendent. ”

This courtyard looks very large, but to the back is a big open space, in the middle of the open space has been erected a city wall made of loess, from a distance to look extremely thick. Li Yu and the others were arranged on a high watchtower. Wang Pi ordered the flag to pick up and wave. Hundreds of soldiers rushed into the field, far below the city, and it seemed that they were about to perform a siege battle.

The soldiers shouted and pushed the two behemoths to the front of the formation, and pulled down the cloth cover covering them, Li Yu and Hao Yu stood up and stretched their necks to look, but they only saw that it was just a trebuchet, and they were a little disappointed.

"It's too far, can you hit it?"

Li Yu asked worriedly, and as he was talking, he saw from a distance that the soldiers had put a small black object on the trebuchet.

"The stone is too small to hurt anyone. Deterrence is also not enough. ”

Hao Jue smacked his lips and said. At this moment, a sharp sound of breaking the air sounded, and two black objects streaked through the air one after the other. The first one smashed on the city wall, there was no reaction, Wang Pi smiled embarrassedly, just wanted to say something, the second one had already smashed into the city, making a loud "boom", and suddenly the loess was filled. Then the first one rang too, and the whole "wall" was out of sight.

"Thunder!"

Li Yu and Hao Yu jumped up violently. The loess spread, and the "city head" slowly appeared, and it had been blown up into a big hole. Li Yu muttered:

"What is this? If dozens of units are thrown at the same time during the siege, and several times in a row, is this still necessary? ”

Listening to Li Chan, I was short of breath for a while, do you think this is Katyusha? Over there, Hao Jue also said:

"If you throw this thing into the cavalry of the enemy brigade, the horses will definitely blow up the group, and our side can almost win without a fight!"

These two guys were thinking about how to use this unknown thing for the first time. Saying that, the two of them were going to ask for instructions to go down to see what was going on, and Wang Pizheng explained to Li Yu:

"The first one is that the lead is a little longer••••••"

Seeing that the two were going down, he hurriedly said:

"The two generals are waiting for a while, there are still them below!"

At that moment, he waved the command flag again, but this time it was a few guys who looked like cars, the target was the city gate, and when they arrived at the city gate hole, the soldiers were busy for a long time and pulled the car out of the city gate hole, and then there was a boom, and it felt like the entire city wall was shaking. Hao Yu said:

"This is not good, this is too slow, and the other party is not a fool, wait for you to 'boom'. It's better to use people who dare to die. ”

In this way, from the siege of the city to the defense of the city, Wang Pi demonstrated the use method he came up with, and the earthen city wall, which took a lot of manpower to build, had opened several big openings by the end of the demonstration. There was also an accident during the demonstration, when the lead of a powder canister on a stone-throwing machine was so short that it exploded before it was fired, injuring dozens of soldiers.

In Chang'an City, the sound of "boom boom" can be faintly heard from time to time. In the Yali of Wannian County, Li Ao said to Han Yu:

"Teacher, there is a lot of thunder today, isn't it weird?"

Han Yu didn't know why, so he muttered for a long time and said:

"The son is silent, the child is silent."